Using STCAPP to make a FXS port a SCCP phone


Wed, 06/10/2015 - 03:20
Nov 25th, 2008

From: ttrentler

The default behavior for an FXS port (a port that you connect an analog phone or fax to)  on a cisco router is to act as a gateway port that is configured with h.323 in CallManager Express.

We can make the FXS port act just like a SCCP controlled phone like a VG224 port or phone connected to an analog telephony adapter.  This way you can control the phone in CallManager express and use CME to manage hunting and other features.

Cisco has a configuration guide for STCAPP at This Link

Below is a sample working configuration:
sccp local FastEthernet0/0.15
sccp ccm identifier 10
sccp ccm identifier 12
sccp ccm group 1
associate ccm 10 priority 1
associate ccm 12 priority 2
associate ccm 30 priority 3
switchback method graceful
stcapp ccm-group 1
dial-peer voice 3 pots
service stcapp
port 0/1/0
voice-port 0/1/0
caller-id enable

wolfgang.lochbihler Thu, 02/12/2015 - 01:30

Hello Leah

Two questions to your document

- how do you configure the SCCP supported port on the CUCM?

- is it possible to do add a voice recording to this port?


Many thanks



Michael Endler Wed, 06/10/2015 - 03:20

Hello Wolfgang,

you have to configure a gateway, which offers the desired fxs-ports:

Callmanager | Devices | Gateway | add gateway
Gateway= Gateway which is in use (show version -> for exampel Cisco 2951)
Protocoll= SCCP
Mac Address (Last 10 Characters)= MAC of your interface (show int gi0/0)
    For example:
        sh int gi0/0
            GigabitEthernet0/0 is up, line protocol is up
            Hardware is CN Gigabit Ethernet, address is d072.dc97.e000 (bia d072.dc97.e000)
        Mac Address=  72DC97E000

Then the biggest issue you can face, is when you not save during your mudule selections (Configured Slots, VICs and Endpoints)

Which port you have to configure you can see by using sh inventory
    For example:
        sh inv
            NAME: "3rd generation four port FXS DID voice interface daughtercard on Slot 0 SubSlot 3", DESCR: "3rd generation four port FXS DID voice interface daughtercard"
            PID: VIC3-4FXS/DID     , VID: V03 , SN: FOC18153SNP
        Port = 0/3/X
        Module in Slot 0= NM-4VWIC-MBRD
        Subunit 3= VIC3-4FXS/DID-SCCP
Rate if usefull!

Best Regards



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